UU Aurigae

UU Aurigae

Observation data Epoch J2000      Equinox J2000
Constellation	Auriga
Right ascension	06^h 36^m 32.8364^s
Declination	+38° 26′ 43.8″
Apparent magnitude (V)	5.446
Characteristics
Spectral type	C5II
B−V color index	2.61
R−I color index	1.43
Variable type	Semiregular variable
Astrometry
Radial velocity (Rv)	12 km/s
Proper motion (μ)	RA: -1.76 mas/yr Dec.: -21.41 mas/yr
Parallax (π)	1.8 ± 0.81 mas
Distance	approx. 1,800 ly (approx. 600 pc)
Absolute magnitude (MV)	-3.19
Details
Mass	2.8±1.1 M☉
Radius	465±130 R☉
Luminosity	15,800 L☉
Temperature	2,820 K
Orbit
Companion	CCDM 06365+3827 B
Semi-major axis (a)	17.9"
Inclination (i)	222°
Other designations
GC 8581, SAO 59280, BD+38° 1539, HD 46687, HIP 31579, HR 2405.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

UU Aurigae is a carbon star and binary star in the constellation Auriga. It is approximately 1810 light-years from Earth.

UU Aurigae is a carbon-rich C-type giant, with a mean apparent magnitude of +5.4. It is classified as a semiregular variable star and its brightness varies from magnitude +7.83 to +10.0 in B with a period of 234 days.

Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
IDS 06295+3831 B (BD+38 1539B)	06^h 36^m 31.7^s	+38° 26' 31	10.7		Simbad

External links

• "The semiregular variable UU Aurigae" (academic paper abstract)
• HR 2405
• CCDM J06365+3827
• Image UU Aurigae